mirror of https://gitee.com/openkylin/nodejs.git
63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
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'use strict';
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require('../common');
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const assert = require('assert');
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const buffer = require('buffer');
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const SlowBuffer = buffer.SlowBuffer;
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const ones = [1, 1, 1, 1];
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// Should create a Buffer
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let sb = SlowBuffer(4);
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assert(sb instanceof Buffer);
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assert.strictEqual(sb.length, 4);
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sb.fill(1);
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for (const [key, value] of sb.entries()) {
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assert.deepStrictEqual(value, ones[key]);
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}
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// underlying ArrayBuffer should have the same length
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assert.strictEqual(sb.buffer.byteLength, 4);
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// Should work without new
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sb = SlowBuffer(4);
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assert(sb instanceof Buffer);
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assert.strictEqual(sb.length, 4);
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sb.fill(1);
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for (const [key, value] of sb.entries()) {
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assert.deepStrictEqual(value, ones[key]);
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}
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// Should work with edge cases
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assert.strictEqual(SlowBuffer(0).length, 0);
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try {
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assert.strictEqual(
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SlowBuffer(buffer.kMaxLength).length, buffer.kMaxLength);
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} catch (e) {
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// Don't match on message as it is from the JavaScript engine. V8 and
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// ChakraCore provide different messages.
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assert.strictEqual(e.name, 'RangeError');
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}
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// Should throw with invalid length type
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const bufferInvalidTypeMsg = {
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code: 'ERR_INVALID_ARG_TYPE',
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name: 'TypeError',
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message: /^The "size" argument must be of type number/,
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};
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assert.throws(() => SlowBuffer(), bufferInvalidTypeMsg);
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assert.throws(() => SlowBuffer({}), bufferInvalidTypeMsg);
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assert.throws(() => SlowBuffer('6'), bufferInvalidTypeMsg);
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assert.throws(() => SlowBuffer(true), bufferInvalidTypeMsg);
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// Should throw with invalid length value
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const bufferMaxSizeMsg = {
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code: 'ERR_INVALID_OPT_VALUE',
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name: 'RangeError',
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message: /^The value "[^"]*" is invalid for option "size"$/
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};
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assert.throws(() => SlowBuffer(NaN), bufferMaxSizeMsg);
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assert.throws(() => SlowBuffer(Infinity), bufferMaxSizeMsg);
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assert.throws(() => SlowBuffer(-1), bufferMaxSizeMsg);
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assert.throws(() => SlowBuffer(buffer.kMaxLength + 1), bufferMaxSizeMsg);
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